The 'Microsoft.Jet.OLEDB.4.0' provider is not registered

Question

• Error : System.InvalidOperationException: 'The 'Microsoft.Jet.OLEDB.4.0' provider is not registered on the local machine. ' • Description : I tried to read an excel file using asp.net web application. Sql connection strings are as follows when open the connection mentioned error ocurred. Already installed • microsoft odbc driver 17 for sql server(17.10.6.1) • Microsoft ole db driver for sql server(18.7.4.0) Try .xls and .xlsx both extentions. Need a help ??

Tuhin Paul · Answer

If you face consistent compatibility issues consider using a library like EPPlus or ClosedXML for Excel file operations. These libraries avoid the dependency on OLEDB and are more reliable for modern applications. using OfficeOpenXml; var package = new ExcelPackage(new FileInfo(path-to-your-file.xlsx)); var worksheet = package.Workbook.Worksheets[0]; for (int row = 1; row

Tuhin Paul · Answer

Replace Microsoft.Jet.OLEDB.4.0 with Microsoft.ACE.OLEDB.12.0 or Microsoft.ACE.OLEDB.16.0  which support both .xls and .xlsx files. Update your connection string as follows: string connectionString = Provider=Microsoft.ACE.OLEDB.12.0;Data Source=yourFilePath;Extended Properties=\Excel 12.0 Xml;HDR=YES;IMEX=1\; Provider=Microsoft.ACE.OLEDB.12.0 : Uses the ACE OLEDB driver to access Excel files. Data Source=yourFilePath : Path to your Excel file. Excel 12.0 Xml : Specifies .xlsx format. HDR=YES : Indicates that the first row in Excel contains headers. IMEX=1 : Treats all data as text to avoid type conversion issues. Also If your application is running in IIS: Open IIS Manager. Go to Application Pools . Select your application pool and click Advanced Settings . Set Enable 32-Bit Applications to True (if using 32-bit Access Database Engine).